GE Telaire Vaporstat 9002 User manual

Telaire Vaporstat™ Model 9002
Infrared Absolute Humidity Sensor
User Instructions
GE
Sensing
T62873-008
October 2006
Page 1 of 6
Introduction
The GE Telaire Vaporstat™9002 sensor
measures in applications in the range of 0
to 80°F dew point. The sensor package is
designed for wall mounting. GE Telaire
offers enclosures for mounting in a variety
of applications including aspirated
sampling of in-duct concentrations,
outside air measurement and measurement
in wet environments.
This manual contains procedures for
installation, wiring and adjustment of the
sensor, and provides conversion
information to translate the dew point measurement of the sensor to
other measurements of humidity, including grains/lb and relative
humidity.
Field Calibration
The sensor features a dual-beam optical assembly that utilizes a neutral
reference measurement to adjust for changes that my occur in the optics.
Although this feature will minimize sensor drift, field calibration at
sensor installation and subsequent periodic calibration is still
recommended to maintain optimum accuracy.
Each sensor has an individually developed curve, based on a certified
chilled mirror hygrometer, with over 8 calibration points. This
individualized curve is stored in the sensor’s permanent memory and is
valid for the life of the sensor. Using a reference device to field calibrate
the sensor at a known concentration re-establishes its original calibration
accruacy. Reference devices include a calibrated reference dew point
sensor or GE Telaire’s Calibration Kit 2076.
Installing the Sensor
Install the sensor and the mount-
ing plate as follows:
1. Prepare for installation by using
the mounting holes configured
for US or European junction
boxes.
2. Use the mounting plate as a
template to mark the mounting
holes.
3. Secure the mounting plate to the
wall or junction box and make
the necessary wire connections.
4. Mount the Controller on the base
by aligning the top clips and then
securing to the bottom clips. A
“snap” sound will indicate that
the sensor is secure. The sensor
will now have power. A 2 minute
warm-up will take place. After 2 minutes, the sensor will stabilize
and display the “Normal Mode” (current water vapor
concentration).
5. Using the procedure outlined in the section “Model 9002 Operating
Modes and Adjustments” , adjust the sensor to provide the proper
elevation correction for your location.
6. Finish installation by sliding the cover over the menu keys and
secure with the screws being provided.
Wiring Diagrams (Typical)
The Model 9002 cannot be wired in a 2-wire configuration where the
power supply also carries the current output of the sensor. Only the 3-
and 4-wire configurations are possible, as shown in Figure 1 below.
Figure 1: Wiring Diagrams (3- and 4- Wires)
clear mode enter clear mode enter
Vaporstat
MountingBracket
1
2
Input
12
3
4
5
6
78
0-10V Output Signal Ground 4-20mA Output Relay Norm Closed Relay Common Relay Norm Open Not Used Not Used
AC- / GND AC+ / DC+
Use Either Output
0-10Vout
4-20mAout
L1
L2
18-30 VAC RMS
1
2
Input
12
3
4
5
6
78
Common
Vaporstat MountingBracket
0-10Vout
4-20mAout
L1
L2
18-30 VAC RMS
Signal Ground
L1
L2
18-30 VAC RMS
NC NO
COM
Vaporstat
MountingBracket
1
2
Input
12
3
4
5
6
78
1
2
Input
12
3
4
5
6
7
8
Vaporstat MountingBracket
Mounting Bracket Pin
Designations
AC Power 3-Wire System
Isolated AC Power 4-Wire
System
Using the Relay Contacts

Page 2 Telaire Vaporstat™ Model 9002
Model 9002 Operating Modes
and Adjustments
Operating Modes
The Model 9002 has the following three operating modes:
Measurement Mode - The sensor operates in the measurement mode.
Adjustment Mode - Allows for adjustment of sensor operational
characteristics, including:
•Altitude correction
•Configuration of display/output
•Adjust measurement range
•Adjust analog output signal range, and
•Adjust relay set point and dead band.
Calibration Mode - This mode can be used to calibrate the sensor in the
field.
Keypad Buttons
Clear Button - Allows to Exit
Adjustment or Calibration mode and
return to measurement mode.
Mode Button - When in the
Adjustment Mode, the mode button
will advance the Model 9002 to the
next variable that can be adjusted.
Arrow Button - Allows user to
increase or decrease values or choose
between selected variables.
Enter Button - Programs new settings
or selection into the sensor.
Clear + Mode (3 sec) - Enter
Adjustment Mode
Clear + Enter (3 sec) - Enter Calibration Mode
Adjusting the Sensor
Using the Onboard Keypad
The sensor is shipped with the factory default settings (as shown in
Table 1 below), which can be adjusted, using the keypad and display.
When in Adjustment Mode, the selection of various adjustment
parameters appears sequentially in the order detailed below. Pressing
clear at any time will exit the Adjustment Mode.
Note: If an adjustment is made to any of the sensor parameters,
it will be retained by the Model 9002 even when the sensor
is powered OFF. Adjustments to the output of the sensor
will only apply to the unit of measure selected for the
display mode. The non-selected display mode will
continue to operate at its factory setting. For example, if
the output range of the dew point measurement is
adjusted, the grains/lb settings will not be affected and
remain at the initial factory settings.
Factory Settings
Adjustments Required for Installation
Select Display Units (°F dew point or grains/lb) (Factory set for dew
point.) - The units selected for display on the LCD will also correspond
to the units used for the analog output and relay setting of the Model
9002.
Set Elevation - Since the density of air and gases are affected by
altitude, a correction must be made to the reading in grains/lb units,
depending on the altitude. The sensor is factory set for sea level
operation.
Calibration - It is also recommended that the user perform a single point
zero or ambient calibration of the sensor to ensure maximum accuracy at
start-up. For details, see the “Calibration” section on page 4.
Adjustment Mode
1. Hold the Clear + Mode buttons for 5 seconds.
2. Each adjustment mode will appear sequentially on the display.
Pressing Mode or Enter will move to the next adjustment value. The
sequence that adjustment values will appear are as follows:
•Altitude
•Display Units
•Analog Output, and
•Relay
Altitude Adjustment
1. Use the Arrow button to adjust altitude up or down in 500 ft.
increments.
2. When altitude is set, press Enter to store the correction in the sensor.
3. Press Mode to move to water vapor display or Clear to exit the
Adjustment Mode.
Display/Output Units between Dew Point (DEW PT) or
Grains/lb (Grains)
1. Press Mode button to leave or skip the elevation selection.
2. Use Arrows to select GRAINS or DEW PT.
3. Press Enter to confirm selection.
4. Press Mode to move to SETTINGS or Clear to exit the Adjustment
Mode.
clear mode enter
Clear
Button Mode Button Arrow Button Enter Button
Table 1: Model 9002 Default Factory Settings
Default
Measurement Unit Dew Point
Selected Measurement
Unit
Dew Point Grains/lb
Display °F Dew Point Grains/lb
Measurement Range 0 to 80 °F Dew
Point
0 - 140 Grains/lb
Analog Output 0 - 10 V and
4 - 20 mA
0 - 10 V and
4 - 20 mA
Relay Set Point 55°F Dew Point 65 Grains/lb
Relay Hysteresis (Dead
Band)
2°FDew Point 5 Grains/lb
Altitude N/A Sea Level (0 feet)

Telaire Vaporstat™ Model 9002 Page 3
Output Adjustments
It is only necessary to make the adjustments described in this section if
you would like to adjust the measurements range of the sensor and/or the
analog output range, or adjust relay settings. If you do not wish to make
these adjustments, press Clear after you have selected the display/output
units.
Adjust Output Ranges
1. Use the steps described above in the section “Adjustments Required
for Installation” to cycle through the startup adjustments on the
sensor until you see the display SETTINGS.
2. Press the Mode button to begin to adjust settings.
Adjust Measurement Value
for Lower Output Limit
Note: The lower output limit adjustment does not affect the
display.
1. The display will indicate GRN FROM or DP FROM.
2. Use the Arrow button to adjust the sensor output value you want to
correspond to the low limit used for the analog output.
3. Press Enter to confirm selection; an arrow should flash on the lower
display (not necessary if no adjustment is made).
4. Press Mode to move to the next selection.
Adjust Measurement Value for Upper
Output Limit
Note: The upper output limit adjustment does not affect the
display.
1. The display will indicate GRN TO or DP TO.
Note: It is possible to adjust the output to consider
concentrations up to 300 grains or a 100 °Fdew point.
2. Use the Arrow button to adjust the sensor output value you want to
correspond to the upper limit used for the analog output.
3. Press Enter to confirm the selection (not necessary if no adjustment
is made).
4. Press Mode to move to the next selection.
Analog Output - The analog output of the sensor will correspond to the
units selected for the LCD display. The sensor is set at the factory to pro-
vide linear 0-10 volt and 4-20 mA outputs over the full measurement
scale of the sensor. If necessary, the analog output range and the mea-
surement range can be user-adjusted to meet any unique requirements
such as a data logger, which may only accept a 0-5 volt input.
Select the Analog Output Scaling Units
The top line of the display will read OUTPUT.
1. Use the Arrow button to select if you want to scale the measurement
range to Vor mA. It should be noted that the scaling adjustment you
select will be applied to both the voltage and mA output. For
example, if you program 0-5 volt output for a 0 to 80 °F
measurement range, the mA output will be 4-12 mA for a 0 to 80 °F
measurement range.
2. Once you have selected the preferred value for scaling (Vor mA),
press Mode.
Select the Lower Limit for Analog Output
1. The top line of the display will read V FROM (or mA FROM).
2. Use the Arrow button to select the lower analog output value you
wish to use to correspond to the low limit measurement value set in
step 2 of the section “Adjust Measurement Value for Lower Output
Limit” above.
3. Press Enter to confirm selection (not necessary if no adjustment is
made).
4. Press Mode to move to the next selection.
Select the Upper Limit for Analog Output
1. The top line of the display will read V TO (or mA TO)
2. Use the Arrow button to select the upper analog output value you
wish to use to correspond to the low limit measurement value set in
step 2 of the section “Adjust Measurement Value for Upper Output
Limit” .
3. Press Enter to confirm the selection (not necessary if no adjustment
is made).
4. Press Mode to move to the next selection
Relay Set Point and Hysteresis
The normally open/closed relay contacts can be set to a specific set point
and hysteresis (dead band). The set point is the point at which the relay is
energized as concentrations rise. Hysteresis is the difference at which the
relay de-energizes when concentrations drop below the set point. The
sensor relay is factory-set to energize at 55 °F dew point (65 grains/lb).
The hysteresis is factory-set at 2 °F dew point (5 grains/lb).
Adjust Relay Activation Levels
1. The top line of the display will read RELAY ON.
2. Use Arrows to select relay on value desired (set point).
3. Press Enter to confirm the selection.
4. Press Mode button to the next selection.
5. The top line of the display will read HYSTER.
6. Use Arrows to select relay hysteresis value desired (dead band).
7. Press Enter to confirm the selection.
8. Press Mode button to exit the adjustment mode.

Page 4 Telaire Vaporstat™ Model 9002
Calibration
Overview - Periodic calibration of the Model 9002 is recommended to
maintain optimum accuracy throughout the life of the sensor. Sensor
calibration can be verified or re-established at any time by using a
reference device. Appropriate reference devices include:
•A recently calibrated hand-held dew point sensor, or
•Flowing a zero calibration gas through the sensor.
Calibration using this technique will re-establish the sensor to its original
factory calibration curve. GE Telaire offers the model 2076 calibration
kit, which provides a zero calibration gas, certified to have less than 0.1
grains/lb of water vapor content, and is ideal for this purpose.
Infrared sensors are unique as in that sensor drift occurs at the zero point
of the sensor calibration and not the span concentration; therefore, span
calibration of the sensor is not required.
Refer to the model 2076 calibration kit manual for additional
information.
Calibration Description - The sensor provides the following two
choices for calibration:
•Single Point Calibration
•Zero Point Calibration
Each method adjusts the zero setting of the sensor. Only one of these
methods should be used for calibration.
Single Point Calibration
This calibration mode allows the user to calibrate the sensor in ambient
air to a known concentration as measured by a recently calibrated
reference device (e.g., a hand held sensor which displays dew point or
grains). This type of calibration will ensure that the greatest sensor
accuracy is provided at or near this concentration used for calibration.
This type of calibration is particularly recommended if high accuracy of
the sensor is required over a narrow range of operation (e.g., clean
rooms). To perform this calibration, you must be confident that the
reference device you are using has been recently and properly calibrated.
The calibration kit is not necessary to perform a Single Point
Calibration.
Zero Point Calibration
This calibration mode allows the user to calibrate the sensor to a verified
zero concentration of water vapor. The display may not indicate 0.0
during the calibration process, which is normal.
Calibration Procedure
NOTICE!
Use of cellular telephones or radio transceivers within two (2) feet of the
sensor during calibration process could cause sensor interference,
calibration errors and affect sensor accuracy. Please refrain from using
these devices during sensor calibration.
Determine which calibration procedure you will use to calibrate the
sensor - Single Point or Zero Point calibration. For best results, the
sensor should be allowed to warm-up for at least ten minutes prior to
calibration.
Note: The calibration kit is not necessary to perform a Single
Point Calibration.
Single Point Calibration
The reference measurement device should be warmed up in normal
measurement/operating mode. The Model 9002 should be in an
environment where concentrations will remain very stable for a
minimum of 10 minutes during calibration. Avoid breathing in the
direction of the sensor; exhaled air contains high levels of moisture and
could disrupt the calibration process.
Perform a Single Point Calibration as follows:
1. Press and hold the Clear + Enter buttons on the Model 9002 for 5
seconds. The word CAL will appear in the top line of the LCD
display.
2. Use the Arrow buttons to change the display to read SINGLE. When
SINGLE is displayed, a water vapor value will display in the lower
screen.
3. Use the Arrow button to adjust the sensor to reflect the concentration
displayed on your reference device.
4. Press the Enter button to calibrate the sensor to the value selected on
the display based on ambient air conditions. Once the Enter button
is pressed, the calibration process will take approximately 8 minutes,
during which time the green LED below the display will flash. Once
calibration is complete, the sensor will revert to its normal display
mode.

Telaire Vaporstat™ Model 9002 Page 5
Zero Point Calibration
All tubing should be connected between the gas bottle and the sensor
inlet flow port, as shown in Figure 2 below. Gas should be flowing to the
sensor at a rate of 80-100 cc/minute for a minimum of 5 minutes prior to
initiating calibration.
Figure 2: Zero Point Calibration - Setup
1. Attach the short hose to the bottom port on the flowmeter.
2. Attach the long hose to the top port on the flowmeter.
3. To insure the flowmeter is kept in the vertical position, secure the
flowmeter to the side of gas bottle using the supplied tie wrap.
4. Remove the protective cap from the nitrogen bottle and attach the
gas regulator.
5. Attach the open end of the bottom hose (located on the flowmeter) to
the gas regulator. Slide the hose far enough on the gas port to ensure
a secure, airtight connection.
6. Insert the male Luer fitting (located on the longer hose) into the
calibration port, located on the bottom of the Model 9002.
7. Verify all the components are installed correctly and initiate the
calibration process by turning the knob on the regulator. Turn the
knob until the indicator reaches 7 psi.
8. Turn the flowmeter knob until the floater reaches 80 -100 cc/ min.
9. Allow the gas to flow for at least 5 minutes before proceeding.
10. Press and hold the Clear + Enter buttons on the keypad for 5
seconds. The word CAL will appear in the top line of the LCD
display.
11. Use the Arrow buttons to toggle to the ZERO calibration mode.
12. When ZERO is displayed, press the enter button to initiate the
calibration process.
13. Once the Enter button is pressed the calibration process will take
approximately 8 minutes, during which time the green LED below
the display will flash repeatedly. Once calibration is complete the
sensor will revert to its normal display mode.
14. Once the display has returned to normal, turn the gas off and
disconnect the tubing connection to complete the process.
Conversion Factors
Dew Point and Relative Humidity (RH)
While the measure of relative humidity is highly dependent on the
temperature of air, the measurement of dew point is not. We can use dew
point to predict what the relative humidity of air will be at a particular
temperature. For a designer or controls contractor, this means that dew
point can be used to predict and control water concentrations in air to
ensure a target relative humidity is not exceeded for a design indoor
temperature condition. The conversion factors chart, as shown in
Figure 3 below, can be used to establish dew point set points for various
common target relative humidity levels over a range of typical
conditioned space temperatures.
Figure 3: Conversion Factors - Chart
cc/min
AIR
200
100
60
O
N
O
F
F
5
10
1520
25
30
clear mode enter
Male Luer
Fitting
Flowmeter
16L Bottle
Nitrogen
Tie Wrap
Regulator
Gas Port
12”Tubing
5Foot
ofTubing
Flowmeter
Knob
Regulator
Knob

Page 6 Telaire Vaporstat™ Model 9002
Specifications
Measurement Method
•Non-Dispersive Infrared (NDIR)
•Dual-Channel
•Non-Interactive.
•Non-Saturating
Sensor Output Units
°F Dew Point
Measurement Range
0 °F to 80 °F (-18 °C to 27 °C) Dew Point
Typical Dew Point Accuracy @ 77 °F (25 °C), 26 °F to 80 °F
DP Range (-3 to 27°C DP)
(As measured against a factory certified reference):
±3.6 °F (2 °C) Dew Point
Altitude Correction
User adjustable in 500 ft. increments using keypad
Operating Temperature Range
•Room and Duct: 32 °F to 120 °F (0 °C to 49 °C), 1508 enclosure
required for duct mounting
•Outdoor: -20 °F to 120 °F (-29 °C to 49 °C), when installed in 1551
enclosure
Storage Temperature
14 °F to 170 °F (-10 °C to 77 °C)
Input Power
•18-30 VAC, 50/60 Hz (half-wave rectified)
•18-42 VDC
•1.75 VA average, 2.75 VA peak
Analog Outputs (available simultaneously)
•0-10 VDC (100 Ohms output impedance)
•4-20 mA (RLmax to 500 Ohms)
Relay Output
•Normally Open and Normally Closed (SPDT)
•Gold Bifurcated, 2A max @ 24 V
Limited Warranty
18 months (see warranty card for details)
Sensor Rated Life
15 years
Accessories
2076 Calibration Kit
Warranty Repairs
GE Sensing will repair Telaire product that fails to meet the terms
provided for in the Return and Warranty Policy Statement (See, http://
www.gesensing.com/service/brochures.htm).Warranty period shall start
from date of manufacture and be based on product category and type of
equipment as specified in Table 1: Product Warranty Periods. For all
warranty repairs, GE Sensing will bear all product repair parts, labor,
and standard ground shipping charges.
This product is covered by one or more of the following patents:
5,650,624/5,721,430/5,444,249/5,747,808/5,834,777/5,163,332/
5,340,986/5,502,308/6,344,798/6,023,069/5,370,114/5,601,079/
5,691,704/5,767,776/5,966,077/6,107,925/5,798,700/5,945,924/
5,592,147/6,255,653/6,250,133/6,285,290
USA
1100 Technology Park Drive
Billerica, MA 01821-4111
Telephone: [phone]
978-437-1000
Fax: [phone]
Web: www.gesensing.com